I'm working on this Olds with the 3.8L and I need some help. The car misfires only when there is drag on the engine i.e. climbing a hill or downshifting to pass. Also, it tends to misfire more when the A/C is on. while coasting or light driving the car runs like a dream. And at rest, it runs great no matter what the rpm is at, as long as there is no drag on the engine. And in addition, it seems to do it worse when the car is at proper operating temperature. There are no codes or check engine lights.


Any ideas what could be the problem?


Some have told me that it could be an electrial problem, and possibly a fuel pump.. Just checking with others that could have had the same problem, so any ideas would help greatly.